No one knows transmissions & torque converters like

Sonnax designs, develops and manufactures the highest quality aftermarket automotive products. We are the world’s largest full-line supplier of torque converter parts, and offer transmission and specialty driveline components through a global network of parts distributors.

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My customers depend on me to keep their vehicles on the road. I depend on Sonnax to help me do that. Thanks Sonnax!

S. Moore, Moore's Transmission

Latest News

January 23, 2019

Top Plow Truck Drivetrain Repairs & Upgrades

HEAVY SNOW. SUB-ZERO TEMPS. BLACK ICE. These are a few of old man winter’s favorite tricks…and they can lead to treacherous driving conditions. Working hard to keep roads safe, plow trucks often burn through transmissions, torque converters and driveshaft assemblies, and end up in the shop.

Check out these top-quality repairs and upgrades to get them back on the road and going strong before the next storm hits:

February 23, 2019, 9:00AM - 4:00PM

ATRA Technical Seminar

55 Ariadne Rd., Dedham, MA

March 02, 2019, 8:00AM - 4:00PM

ATSG Technical Seminar

Louisville, KY

March 02, 2019, 9:00AM - 4:00PM

I am a Sonnax fan because no matter if I am rebuilding an everyday transmission or a race transmission, I can trust the quality of the Sonnax parts I choose.

C. Lentech, Lentech Automatics

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Sonnax tools save me time, money and come backs, I use them on every rebuild we do in my shop.

E. Sebris

Enjoy a rewarding career and relaxing quality of lifein beautiful Southern Vermont.

Recognized as one of the Best Places to Work in Vermont and recipient of the Governor's Worksite Wellness Award, Sonnax is a leading supplier to the automotive aftermarket. We design, manufacture, test and distribute a wide variety of innovative, high quality products used to remanufacture torque converters, rebuild automatic transmissions, upgrade driveshafts and protect the driveline from over-torque damage.

Sonnax is one of the fastest growing companies in the state of Vermont. Our name has become synonymous with exceptional service, cutting-edge designs, technical knowledge and customer dedication. Join an exciting front-line team focused on developing and delivering the best products in the industry, a team whose imagination, hard work and results are rewarded.

Sonnax is an industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology.